关键词: 摇床重选精矿, 尼尔森重选, 摇床, 浮选

Abstract: The overall particle size of the gravity separation concentrate by shaker of Qiyugou concentrator is coarser，the particle size concentration range is 0.90～0.10 mm，and the gold is obviously enriched in 0.90～0.45 mm.The metal minerals in the samples are mainly pyrite，and the gold mainly exists in the form of auxogenous gold，followed by sulfide coated gold and monomer gold，the content of which are 57.86%，30.70% and 11.21%，respectively.The gold minerals are mainly round，and gangue minerals are embedded on the surface of a few gold minerals. In order to recover gold efficiently，the beneficiation process test was carried out. The results showed that flotation after grinding is better than direct shaker gravity separation without grinding and Knelson gravity separation after grinding，and the concentrate with gold grade of 27.90 g/t and recovery rate of 58.39% can be obtained. On the basis of the experimental results and the production practice of similar mines，the process flow optimization was carried out，that is，the gravity separation concentrate was directly returned to the ball mill，which can greatly simplify the process flow.

Key words: gravity separation concentrate by shaker, Knelson gravity separation, shaker, flotation